I have always wanted a pet tortoise. What has stopped me? I hate to jump into things, that's what. Tortoises live forever. If I were to get a tortoise it may very well outlive me. But that's what's appealing to me (not the outliving part, the long life part).
They're not something you can cuddle with or teach tricks to, but I'm sure they can offer some calm companionship for many years to come.
Aww, who wouldn't want one? These guys are Russian tortoises, by the way.